Method of securing an electrotype-insert in an etched plate.



METHOD 0F SECURINVG AN ELECTROTYPE INSERT INvAN ETGHED'PLATE.

' 'APPucATIoN man SEPT'. s, 1914.

nwo am 103mm@ A l www,

Patented July 27, 1915.

STATES y PATENT Vonirica.

JOHN il". COOK, 0F CHICAGO, ILLINQIS.

MTHOD OF SECURING AN ELECTRTYPE-IBQSERT IN AN ETCHED YLATE.

. Specification of Letters Patent.

Patented July 27, MM5.

Application led September 5, 18M. Serial No, 860,329.

'0 all ill/'acm it may concern Be it known that l', JOHN J. Coon, a citizen oit the nited States, residing at Chicago, in the county oi Coekiand State of illinois, have inventedcertain new and useful improvements in Methods ot Securing. an Electrotype-lrnsert in an Etched Plate,4 .of 'which the following is a specification. A

This invention relates to an improved method of soldering an electrotype vinsert or patch in an etched platefor printing purposes.

ln the production of plates for the print- Aing of illustrated catalogues, circulars, and

similar advertising matter, 1t 1s a, common printed matter descriptive of lthe cuts.-

'These elcctrotype inserts or patches have Aals heretofore been secured Within the openings of the zincor copper plate etching by an ordinary soldering operation, the illed etching' being laid face downward on a suitable :dat surface, and the solderbeing applied to the joints on thebaclr side of theplate by running a stick of solder and a soldering iron over the saine in the usual `:method of soldering. Where an etching contains a considerable number of 'such inserts or patches, this soldering operation is a quite 'laborious and tedious one. requiring considerable 'time and pains on the part of the operator to do a goed iob.

The object of my present invention is to simplify and Jfacilitate the operation of securing these inserts or-patches in the openings of the etched plate; and this object l'4 accomplish by the new and improved method of Soldering' forming the subject matter oi' this invention arid hereinafter described in detail. in order that my invention may be clearly understood have illustrated in the accompanying drawin a printing plate of the character reierre to, the several views illus trating various stages of the latter at diii'erent points of the process or manufacture.

Referring tothe drawing. Figure l is a top plan or 'Face *view oi an etched plate. show ing tivo electrotype inserts or patches set therein: Fin'. Q is a bottom plan or hack view of the same and show-ing the joints between the late and the electrot Je inserts over* laid by thin strips of soldering material, such. as tin foil, preliminary to the jfinal operations by which lthis soldering material is melted and caused to fion' into said joints; Figi' is'anenlarged cross sectional detail on the line 3-3 of Fig. Q, and Fig. 4 is an enlarged cross sectional detail through a soldered and finished joint.

In carrying out my invention, l take a Zinc or copper plate 5 on which has been .etched certain subject matter of a pictorial or descriptive character, such as is shown at' 6 and 7, and at suitable points thereon l saw or otherwise out out portions of this plate thereby forming openings therethrough, the margin lines ofwliich 'are indicated at 8. The etched plate 5 thus prepared is laid face downward on a suitable support, and into the openings are loosely fitted the electrotype inserts or vpatches 9, these latter usually containing electrotypes descriptive of the etchings. I then preferably coat the joint between meeting edges of the plate 5 and electrotypes 9 with any suitable soldering flux such as inuriate of zinc, this latter being indicated at l0 in Fig. l then completely cover said joint With-thin flexible strips llof solderingcr 1naterial,-ordinary tin foil servingr well for' this purpose. The rear sur face of the plate thus treated, is then 'preferably overlaid by e." thin sheet of paper indicated at 12 in Figxx, on which letter is then placed a relatively stiff sheet 13 of cardboard, 'strawboard, or the like which serves to support the assembled parts While being transferred onto a heated surface, on which the assembly is laid cardboard side down. The heated surfacere'erred to is maintained at a temperature that suiiices., after an application of approximately one minute, to completely nielt the tin foil soldering material by heat transmitted through the supj'igrting sheet or sheets 12- end After the soldering material is melted, the

assembly is transferred to a cold surface, and

is preferably placed beneath a press which forces the melted solder thronghly and nniA formly into the joints. filling the latter, as indicated at le in Fig. '-l. and securely uniting the oleclrotype plates to the zinc or copper plate etchinf, with their printing sur-` faces in the plane of' the etched matter on the plate 5. The supportingr plate i3 is then removed. and with a metal scraper the ad- .haring portions of the paper sheet l2 and tige iso surplus soldei are quickly removed, and the completed article is -ready for the printingy press.

By my improved method of soldering the patched etching can be produced in a small fraction of the time heretofore required to produce the same in the known and 'common method and with much -less labor and skill on the part of the operator. Furthermore, my improved method produces a stronger and more uniform and perfect joint than can 1 hearth of the machine for melting the solder and being then slid rdeewise into the press oi' the n'iaffhine for the iinai ernnpressing operation. There the article. is produced in this way the use of the thin paper sheet 12 is not essential, but` preferable because much easier to scrape from the bach of the linishe article than the heavier straiv'board or fr oard sheet 13 which supports the parts in assembled position during transfer to the heating and pressing apparatus.'

claim:

il. A method of securing an eleetrotype insi'rt in an etched plate which consists in cutan opening through the latter oi" subitially the form and size of the electro i' e, setting the latter in said Opening, eoverirg the joint between meetiwr edges ot 'the plate and inserted electrdu on 'the rear of said electretype and plate with a ilesible soldering material snen as tin n, and then applying sniicient heat to saifil solderifig mater to canse it to melt and fiow in"o said jo 3 A method of securingV an ciectrotyjiie .in-

.i in an etched plate which consists in cutting an opening through 'the latter oi sub- -tepes of this patent may be obtained. f or 3. A method of securing an electrotype in! sert in an etched plate which consists in cutting an opening through the latter of substantially the form and size of the electrotype, setting the latter in said opening, coat-` ing the joint between meeting edges of the plate and inserted electrotype on the rear sides ofsaid electrotype and plate with asoldering linx, covering said joint with thin iexible strips of soldering material such as tin toil, covering the rear side of the plate thus prepared with a supporting sheet, depositingr the assembled structure rear side down on 'a fiat surface, and then applying heat and pressure sulhcient to melt said soldering material and force it into the joint between the plate and the electrotype.

4. A method of securing an electrotype insert in an etched plate which consists in cutting an opening through'the latter of substantially the form and size of the electrotype.` setting the latter in said opening,lcoat ing the joint between meeting edges of the plate and inserted. electrotype on the rear sides ot said eleetrotype and plate with'a soldering flux. covering said joint With thin strips ot' a soldering material such as tin toil. entering the rear side of the plate thus prepared with a supporting sheet, depositing the assembled structure rear side down on a heated plate and allowing it to remain tlereon a sulticient length of time to melt sai^ soldering material, and finally applying pressure t') Vtorce the melted soldering inaterial into the joint between the plate and the eiectro'type.

JOHN J. COO'K- 'Witnessesr S. N. POND, A. G. LATIMER.

are cents each, byaddressing'the G'ommissionerof Patents, Washington, D. C. 

